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FBPOINT(1)			    BRL-CAD			    FBPOINT(1)

NAME
       fbpoint - point at and identify screen coordinates

SYNOPSIS
       fbpoint [-F framebuffer]	[-w width] [-n height] [-s squaresize]
	       [-x [prefix]] [-y [prefix]] [initialx initialy]

DESCRIPTION
       fbpoint allows you to move a non-destructive cursor around on the
       display.	As the cursor is moved around, fbpoint writes the coordinates
       of the pixel pointed at by the cursor, and the red, green, and blue
       values of that pixel, on	standard error fbpoint also writes the last
       set of coordinates pointed to on	standard out on	exit. The starting
       position	is center-screen unless	optional initialx initialy is given.

       The ``h'', ``j'', ``k'',	and ``l'' commands step	the cursor one pixel
       left, down, up, or right	respectively, and the ``H'', ``J'', ``K'', and
       ``L'' commands step the cursor in the corresponding directions in big
       increments. The ``B'', ``N'', ``P'', and	``L'', and ``^B'' (control-B),
       ``^N'', ``^P'', and ``^F'', are also little and big (respectively)
       cursor movement commands.

       A ``?'' prints a	short command summary, and typing ``q''	or ``Q'' exits
       the program.

       Using this program with grave accents in	a shell	script in order	to
       interactively grab a pair of coordinates	is one of its main intentions.
       This is the reason for the feedback on standard error and the final
       coordinate pair on standard out.	By default, both the x and y
       coordinates are written.	If the -x or -y	flags are given	only those
       coordinates will	be written. In these cases an optional prefix can
       follow the flag which will be appended to the output coordinate.	This
       is to facilitate	passing	the output of this program as arguments	to
       another.

EXAMPLES
       fbpoint by itself is used to pick coordinates or	pixel values from a
       display.

       fbscanplot `fbpoint -y`

       allows you to choose the	scanline to plot using fbpoint.

       pix-fb `fbpoint -x-X -y-Y` file.pix

       allows you to select an x, y screen coordinate location and then	place
       the lower left corner of	the image file.pix there.

SEE ALSO
       brlcad(1), fbgrid(1), fbzoom(1)

AUTHOR
       BRL-CAD Team

COPYRIGHT
       This software is	Copyright (c) 1986-2019	by the United States
       Government as represented by U.S. Army Research Laboratory.

BUG REPORTS
       Reports of bugs or problems should be submitted via electronic mail to
       devs@brlcad.org

BRL-CAD				  08/29/2020			    FBPOINT(1)

NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | SEE ALSO | AUTHOR | COPYRIGHT | BUG REPORTS

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